We also encountered the challenging impact of domain differences in identifying offensive language.
Our attempt to (naively) increase the amount of available training data by combining
the OffensEval and HatEval data had no impact on our results, and our feature analysis
made it clear that the two corpora were different to the point of not really providing
much shared information that could be leveraged. That said, we intend to explore
more sophisticated approaches to transfer learning (e.g., [1]}, [2]}, [3]}) since there are quite a few distinct corpora where various forms of hate speech have been annotated.
